51182549096821 has 2 divisors, whose sum is σ = 51182549096822. Its totient is φ = 51182549096820.

The previous prime is 51182549096773. The next prime is 51182549096843. The reversal of 51182549096821 is 12869094528115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51052382559025 + 130166537796 = 7145095^2 + 360786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51182549096821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51182549096821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51182549096321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25591274548410 + 25591274548411.

It is an arithmetic number, because the mean of its divisors is an integer number (25591274548411).

Almost surely, 2^{51182549096821} is an apocalyptic number.

It is an amenable number.

51182549096821 is a deficient number, since it is larger than the sum of its proper divisors (1).

51182549096821 is an equidigital number, since it uses as much as digits as its factorization.

51182549096821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12441600, while the sum is 61.

The spelling of 51182549096821 in words is "fifty-one trillion, one hundred eighty-two billion, five hundred forty-nine million, ninety-six thousand, eight hundred twenty-one".